Well if the male is clearly showing interest he's in the right mode but if the female isin't receptive, then in snake terms , no means no.

Might just have to let them be for a little while and hope they are getting it on when no one's looking. Not sure there a way to caox a female into breeding mode beside the cooling and/or putting her with anoher female who is actually being bred, that might make the pheremones rub off on her and make her more receptive.